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Questions and answers by
Mwalimu Tlanka
Answers (1)
Data given Mass = 0.2 kg Height = 20 m Energy lost = 30J Required, Height after rebound = ? PE after rebound = Original PE - Energy lost mgh' = mgh - E 0.2×10×h' = 0.2×10×20 - 30 2h' = 40 -30 2h' = 10 h' = 10/2 h' = 5 Therefore, height reached after
